Testing MacOsX 10.11 El Capitan Developer Preview on the SurfacePro 1°gen (From Backup date missing)

MacOsX 10.11 El Capitan Developer Preview:

Touch-Base's multitouch driver not working yet, works only after the installation, doesn't work after reboot.

To create a bootable drive you can use the same process done for Yosemite: createinstallmedia.

example with a fresh formatted drive named Install and the OS X installer app on the desktop:

sudo /Users/USERNAME/Desktop/Install\ OS\ X\ 10.11\ Developer\ Beta.app/Contents/Resources/createinstallmedia --volume /Volumes/Install/ --applicationpath /Users/USERNAME/Desktop/Install\ OS\ X\ 10.11\ Developer\ Beta.app

edits to boot the installer:

Mount your efi partition, edit the config.plist to add "rootless=0" as a new boot argument, create a folder named 10.11 inside kexts, 

and copy fakesmc acpibacklight and acpibatterymanager

boot with kext injection

after installation:

boot with kext injection

Delete AppleHDA from /System/Library/Extensions first.

Then install the one inside Yosemite folder from the package with KextDrop.

reboot and have fun.

Remember that this is an early developer preview, seems pretty stable, but it's not good for daily usage.

USING ROOTLESS=0 BOOTFLAG DISABLES SYSTEM INTEGRITY PROTECTION AND IT'S REALLY DANGEROUS AND NOT SUGGESTED.

YOU HAVE BEEN WARNED!

An update to the files package would probably be released when the Final version is out.